English
Maharashtra State BoardSSC (English Medium) 10th Standard

Classify the following elements into metals, non-metals and metalliods As, C, Hg, Mg, S, Si - Science and Technology 1

Advertisements
Advertisements

Question

Classify the following elements into metals, non-metals and metalliods

As, C, Hg, Mg, S, Si

Advertisements

Solution

Metals Non-metals Metalloids
Hg C Si
Mg S As
shaalaa.com
  Is there an error in this question or solution?
2014-2015 (March)

APPEARS IN

RELATED QUESTIONS

The position of eight elements in the Modern Periodic Table is given below where atomic numbers of elements are given in the parenthesis.

Period No.    
2 Li(3) Be(4)
3 Na(11) Mg(12)
4 K(19) Ca(20)
5 Rb(37) Sr(38)

(i) Write the electronic configuration of Ca.

(ii) Predict the number of valence electrons in Rb.

(iii) What is the number of shells in Sr?

(iv) Predict whether K is a metal or a non – metal.

(v) Which one of these elements has the largest atom in size?

(vi) Arrange Be, Ca, Mg and Rb in the increasing order of the size of their respective atoms.


What is meant by 'group' in the modern periodic table? How do the following change on moving from top to bottom in a group?

(i) Number of valence electrons

(ii) Number of occupied shells

(iii) Size of atoms

(iv) Metallic character of element

(v) Effective nuclear charge experienced by valence electrons


Calculate the mass of Calcium that will contain the same number of the atom as are present in 3.2 gm of Sulphur.

[Atomic masses: S=32, Ca=40]

 


How does the number of valence electrons vary on moving from left or right in the first period of the periodic table?


How does the number of valence electrons vary on moving from left or right in the second period of the periodic table?


Rewrite the following statement after correction, if necessary:

Elements in the same period have equal valency


How does the size of atoms (atomic size) generally vary in going from left to right in a period of the periodic table? Why does it vary this way?


What happens to the metallic character of the elements as we move from left to right in a period of the periodic table?


 In terms of electronic configurations, explain the variation in the size of the atoms of the elements belonging to the same period and same group ?


Five elements A, B, C, D and E have atomic numbers of 2, 3, 7, 10 and 18 respectively. The elements which belong to the same period of the periodic table are:

(a) A, B, C
(b) B, C, D
(c) A, D, E
(d) B, D, E


 Given alongside is a part of the periodic table. As we move vertically downward from Li to Fr:

Li Be
Na  
K  
Rb  
Cs  
Fr Ra

 What happens to their metallic character?


Which of the following element would lose an electron easily?

(a) Mg
(b) Na
(c) K
(d) Ca


Why are noble gases placed in a separate group?


An element has 2 electrons in its N shell.

State the name assigned to this group.


State the valency of the elements of periods 3 and write the formula of their oxides.


An element X belong to 3rd periods and group II of the periodic table state: 

the number of valence electrons,


An element X belong to 3rd periods and group II of the periodic table state:

the valency,


State the number of elements in periods 1, Periods 2, and Period 3 of the periodic table. Name them.


Four elements P, Q, R and S belong to the third period of the Modern Periodic Table and have respectively 1, 3, 5 and 7 electrons in their outermost shells. Write the electronic configurations of Q and R and determine their valences. Write the molecular formula of the compound formed when P and S combine.

 


How can the valency of an element be determined if its electronic configuration is known?


On the basis of electronic configuration, how will you identify the first and the last element of a period?


Study the extract of the Periodic Table given below and answer the questions that follow. Give the alphabet corresponding to the element in question. DO NOT repeat an element. 

The ion of which element will migrate towards the cathode during electrolysis?


Fill in the blank
Oxidising property ________from fluroine to iodine because the power to accpet electron decreases.


Explain
Size of atom changes when it loses or gain electron


Name the elements in period 1.


How many elements are there in period 2?


Parts (i) to (v) refer to changes in the properties of elements on moving from left to right across a period of the periodic table. For each property, choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d).
(i) The non metallic character of the elements:
(a) Decreases
(b) Increases
(c) Remains the same
(d) Depends on the period
(ii) The electro negativity
(a) Depends on the number of valence electrons
(b) Remains the same
(c) Decreases
(d) Increases
(iii) The ionization potential
(a) Goes up and down
(b) Decreases
(c) Increases
(d) Remains the same
(iv) The atomic size
(a) Decreases
(b) Increases
(c) Remains the same
(d) Sometimes increases and sometimes decreases
(v) The electron affinity of the elements in groups 1 to 7:
(a) Goes up and down
(b) Decreases and then increases
(c) Increases
(d) decreases


The elements of one short period of the periodic table are given below in order from left to right:
Li  Be  B  C  O  F Ne
(a) To which period do these elements belong?
(b) One element of this period is missing. Which is the missing element and where should it be placed?
(c) Place the three elements, fluorine, beryllium and nitrogen, in the order of increasing electro negativity.
(d) Which one of the above elements belongs to the halogen series?


Arrange the following in order of increasing radii: 

 Mg2+, Mg, Mg


The position of elements A, B, C, D and E in the periodic table are shown below:

Group 1

Group 2

Group 17

Group 18

 

 

 

D

 

B

C

 

A

 

 

E

State which is most reactive (i) metal (ii) non-metal

 


Name and state the following with reference to the elements of the first three periods of the periodic table.

Metalloid in Period 3.


Moving down in the second group, number of valence electrons ______.


The electronic configuration of an element is 2, 8, 4. State it: 
group and period in the Modern Periodic Table.


Based on the group valency of element write the molecular formula of the following compound giving justification:

Compound formed when an element A of group 2 combines with an element B of group seventeen.


The position of certain elements in the Modern Periodic Table is shown below:

Using the above table answer the following questions giving reasons in each case :
(i) Which element will form only covalent compounds?
(ii) Which element is a non-metal with valency 2?
(iii) Which element is a metal with valency 2?
(iv) Out of H, C, and F which has the largest atomic size?
(v) To which family does H, C, and F belong?


Name the period which is the shortest period of the periodic table.


State the property trends in general of elements on moving from left to right in a period of the periodic table.


Name or state following with reference to the element of the first three periods of the periodic table.

The valency of the element in period 3 having atomic number 17.


Fill in the blanks from the words A to F given below’.

A: Decreases
B: Increases
C: Remains same
D: Increases by one
E: Electropositive
F: Electronegative

Across a period from left to right in the Modern Periodic Table.
No. of electron shells _________; No. of valence electrons __________: Electronegativity increases Character of elements changes from electropositive to ________.


There are three elements E, F, G with atomic numbers 19, 8 and 17 respectively.

Classify the above elements as metals and non-metals.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×